body {
  background: linear-gradient(to bottom, #001a33 0%, #003d66 50%, #005580 100%);
  background-attachment: fixed;
  margin: 0;
  padding: 0;
  overflow-x: hidden;
  position: relative;
}

/* Bubble Effect Background */
.bubble {
  position: fixed;
  bottom: -100px;
  background: radial-gradient(circle at 30% 30%, rgba(255, 255, 255, 0.3), rgba(135, 206, 250, 0.2));
  border-radius: 50%;
  opacity: 0.6;
  animation: rise 15s infinite ease-in;
  z-index: 0;
  box-shadow: inset 0 0 20px rgba(255, 255, 255, 0.3);
}

@keyframes rise {
  0% {
    bottom: -100px;
    transform: translateX(0) scale(1);
    opacity: 0;
  }
  10% {
    opacity: 0.6;
  }
  90% {
    opacity: 0.4;
  }
  100% {
    bottom: 110vh;
    transform: translateX(100px) scale(0.8);
    opacity: 0;
  }
}

/* Aquatic Wonders Title */
#creatures h2 {
  text-align: center;
  font-size: 3.5rem;
  font-weight: bold;
  color: #00d4ff;
  text-transform: uppercase;
  letter-spacing: 3px;
  margin: 40px 0;
  position: relative;
  display: inline-block;
  width: 100%;
  text-shadow: 
    0 0 10px rgba(0, 212, 255, 0.8),
    0 0 20px rgba(0, 212, 255, 0.6),
    0 0 30px rgba(0, 212, 255, 0.4),
    2px 2px 4px rgba(0, 0, 0, 0.5);
  animation: glow 3s ease-in-out infinite;
}

#creatures h2::before,
#creatures h2::after {
  content: "🐠";
  position: absolute;
  font-size: 2rem;
  animation: swim-icon 4s ease-in-out infinite;
}

#creatures h2::before {
  left: 10%;
  animation-delay: 0s;
}

#creatures h2::after {
  right: 10%;
  animation-delay: 2s;
}

@keyframes glow {
  0%, 100% {
    text-shadow: 
      0 0 10px rgba(0, 212, 255, 0.8),
      0 0 20px rgba(0, 212, 255, 0.6),
      0 0 30px rgba(0, 212, 255, 0.4),
      2px 2px 4px rgba(0, 0, 0, 0.5);
  }
  50% {
    text-shadow: 
      0 0 20px rgba(0, 255, 255, 1),
      0 0 30px rgba(0, 255, 255, 0.8),
      0 0 40px rgba(0, 255, 255, 0.6),
      2px 2px 4px rgba(0, 0, 0, 0.5);
  }
}

@keyframes swim-icon {
  0%, 100% {
    transform: translateY(0) rotate(0deg);
  }
  50% {
    transform: translateY(-10px) rotate(10deg);
  }
}

/* Ocean map */
#map {
  padding: 30px;
  position: relative;
  z-index: 1;
}

.map-canvas {
  position: relative;
  height: 300px;
  background: rgba(255,255,255,0.05);
  border-radius: 12px;
  overflow: hidden;
}

/* 🐠 Fish shapes and animation lanes */
.fish {
  position: absolute;
  width: 100px;
  height: 40px;
  background: linear-gradient(90deg, #6ee7ff, #2aa0d1);
  border-radius: 50px;
  opacity: 0.8;
  animation: swim 12s linear infinite;
}

.fish1 {
  top: 25%;
  left: -120px;
}

.fish2 {
  top: 60%;
  left: -150px;
  width: 140px;
  height: 45px;
  animation-duration: 15s;
}

/* Smooth fish motion */
@keyframes swim {
  0%   { transform: translateX(-150px) translateY(0); }
  25%  { transform: translateX(25vw) translateY(-10px); }
  50%  { transform: translateX(50vw) translateY(10px); }
  75%  { transform: translateX(75vw) translateY(-10px); }
  100% { transform: translateX(100vw) translateY(0); }
}

/* ✨ Flash animation for fact change */
@keyframes flashFact {
  0%   { background: rgba(255,255,255,0.6); transform: scale(1.2); }
  50%  { background: rgba(255,255,255,0.3); transform: scale(0.95); }
  100% { background: rgba(255,255,255,0.2); transform: scale(1); }
}

.hotspot.flash {
  animation: flashFact 0.8s ease;
}

/* Hotspot buttons (rectangles) */
.hotspot {
  position: absolute;
  padding: 8px 14px;
  background: linear-gradient(45deg, rgba(255,255,255,0.25), rgba(0,191,255,0.25));
  border: none;
  color: white;
  border-radius: 10px;
  cursor: pointer;
  font-weight: 500;
  letter-spacing: 0.5px;
  box-shadow: 0 4px 10px rgba(0, 191, 255, 0.3);
  transition: all 0.35s ease;
}

.hotspot:hover {
  transform: scale(1.1);
  background: linear-gradient(45deg, rgba(0,191,255,0.5), rgba(30,144,255,0.6));
  box-shadow: 0 6px 15px rgba(0, 191, 255, 0.6);
}

.hotspot:active {
  transform: scale(0.95);
  background: linear-gradient(45deg, rgba(30,144,255,0.8), rgba(0,191,255,0.8));
}

/* Modal background */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

/* Modal box */
.modal-content {
  background: #002b4d;
  padding: 20px;
  border-radius: 10px;
  width: 300px;
  color: white;
  text-align: center;
  position: relative;
}

/* Close button */
.close-modal {
  position: absolute;
  top: 8px;
  right: 8px;
  background: none;
  border: none;
  font-size: 20px;
  color: white;
  cursor: pointer;
}

/* Cards */
.card {
  width: 200px;
  height: 280px;
  perspective: 1000px;
  position: relative;
  z-index: 2;
}
.card.is-flipped {
  z-index: 10;
}

#creatures {
  position: relative;
  z-index: 1;
}

.card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transition: transform 0.6s;
  transform-style: preserve-3d;
}

.card.is-flipped .card-inner {
  transform: rotateY(180deg);
}

.card-front, .card-back {
  position: absolute;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  border-radius: 10px;
  overflow: hidden;
  background: rgba(255,255,255,0.05);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 10px;
}

.card-back {
  transform: rotateY(180deg);
}

.card-front img {
  width: 100%;
  height: 140px;
  object-fit: cover;
  border-radius: 8px;
}

.card-front h3, .card-back p {
  color: white;
}

/* Cards layout */
.cards-grid {
  display: flex;
  flex-direction: row;
  justify-content: center;
  align-items: flex-start;
  gap: 40px;
  flex-wrap: wrap;
  padding: 30px;
}

/* Buttons */
#randomFishBtn,
#randomizeFishesBtn {
  padding: 12px 28px;
  background: linear-gradient(45deg, #1e90ff, #00bfff);
  color: white;
  font-size: 18px;
  border: none;
  border-radius: 50px;
  cursor: pointer;
  box-shadow: 0 4px 15px rgba(0, 191, 255, 0.4);
  transition: all 0.3s ease;
  position: relative;
  z-index: 1;
}

#randomFishBtn:hover,
#randomizeFishesBtn:hover {
  background: linear-gradient(45deg, #00bfff, #1e90ff);
  transform: scale(1.08);
  box-shadow: 0 6px 20px rgba(0, 191, 255, 0.6);
}

#randomFishBtn:active,
#randomizeFishesBtn:active {
  transform: scale(0.96);
}

/* Chatbot */
#oceanChatbot {
  position: fixed;
  bottom: 20px;
  right: 20px;
  width: 280px;
  background: rgba(0,43,77,0.9);
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 15px rgba(0,0,0,0.4);
  font-family: sans-serif;
  z-index: 2000;
}

#chatHeader {
  background: linear-gradient(90deg, #00bfff, #1e90ff);
  color: white;
  padding: 12px;
  cursor: pointer;
  font-weight: bold;
  text-align: center;
}

#chatBody {
  display: flex;
  flex-direction: column;
  height: 350px;
  max-height: 350px;
  display: none;
}

#messages {
  flex: 1;
  padding: 10px;
  overflow-y: auto;
  color: white;
}

#userInput {
  padding: 8px;
  border: none;
  border-top: 1px solid #00bfff;
  outline: none;
  width: calc(100% - 60px);
  border-radius: 0;
  background: rgba(255,255,255,0.1);
  color: white;
}

#sendBtn {
  width: 50px;
  border: none;
  background: #00bfff;
  color: white;
  cursor: pointer;
}

#messages .user {
  text-align: right;
  margin: 4px 0;
}

#messages .bot {
  text-align: left;
  margin: 4px 0;
}